Ip Addresses, Network Masks, And Subnets; Ip Addresses - Modecom MC-421 User Manual

WLAN Router
The IP address of the default gateway for your LAN. In most cases, this is the address assigned to the LAN port on
the Wireless Gateway. By default, the LAN port is assigned the IP address 10.0.0.2. (You can change this number or
another number can be assigned by your ISP. See Addressing for more information.)
The IP address of your ISP's Domain Name System (DNS) server.
On each PC to which you want to assign static information, follow the instructions relating only to checking for and/
or installing the IP protocol. Once it is installed, continue to follow the instructions for displaying each of the Internet
Protocol (TCP/IP) properties. Instead of enabling dynamic assignment of the IP addresses for the computer, DNS se-
rver and default gateway, click the radio buttons that enable you to enter the information manually.
Your PCs must have IP addresses that place them in the same subnet as the Wireless Gateway's LAN port. If
you manually assign IP information to all your LAN PCs, you can follow the instructions in Addressing to chan-
ge the LAN port IP address accordingly.
Note

IP Addresses, Network Masks, and Subnets

IP Addresses

This section refers only to IP addresses for IPv4 (version 4 of the Internet Protocol). IPv6 addresses are not co-
vered.
This section assumes basic knowledge of binary numbers, bits, and bytes.
Note
IP addresses, the Internet's version of telephone numbers, are used to identify individual nodes (computers or de-
vices) on the Internet. Every IP address contains four numbers, each from 0 to 255 and separated by dots (periods),
e.g. 20.56.0.211. These numbers are called, from left to right, field1, field2, field3, and field4.
This style of writing IP addresses as decimal numbers separated by dots is called dotted decimal notation. The IP ad-
dress 20.56.0.211 is read "twenty dot fifty-six dot zero dot two-eleven. "
Structure of an IP address
IP addresses have a hierarchical design similar to that of telephone numbers. For example, a 7-digit telephone num-
ber starts with a 3-digit prefix that identifies a group of thousands of telephone lines, and ends with four digits that
identify one specific line in that group.
Similarly, IP addresses contain two kinds of information:
• Network ID
Identifies a particular network within the Internet or intranet
• Host ID
Identifies a particular computer or device on the network
The first part of every IP address contains the network ID, and the rest of the address contains the host ID. The length
of the network ID depends on the network's class (see following section). The table below shows the structure of
an IP address.
Field1
Class A Network ID
Class B Network ID
Class C Network ID
Here are some examples of valid IP addresses:
Class A: 10.30.6.125 (network = 10, host = 30.6.125)
Class B: 129.88.16.49 (network = 129.88, host = 16.49)
Class C: 192.60.201.11 (network = 192.60.201, host = 11)
www.modecom.eu
110
Field2 Field3
Host ID
Host ID
Field4
Host ID